Beater for sack-cleaning machines



G. ROYA-N.

BEATER FOR SACK CLEANING MACHINES.

APPLICATION FILED AUG.9, 191s.

rammed Mar. 30 1920 UNITED STATES PATENT OFFICE. 5

GEORGE ROYAN, OF CHICAGO, ILLINOIS, Assrenoia r0 AMERICAN ovnn & MACHINE COMPANY, or oHIc eo, ILLINOIS, A CORPORATION.

BEATER FOR SACK-CLEANING MACHINES.

1 '0 all whom it may concern:

Be it known that I, GEORGE ROYAN, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Beaters for Sack-Cleaning Machines, of which I do declare the followingto be a full, clear, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

The present invention has for its object to provide an improved construction of beater, which while susceptible of use in other machines, is particularly adapted as ab.eater for sack cleaning machines.

In sack cleaning machines as heretofore constructed, the heaters are usually made of strips of rubber belting fastened to a rapidly revolving shaft. An example of this type of beater is shown in Letters Patent No. 839,533, granted to F. J. Wolfe December 25, 1906. While beaters formed of strips of rubber belting are advantageous in that they give a desirable elasticity to the beater blades, such heaters are objectionable in other respects. One main objection to the use of beaters formed of rubber belting is that the edges of the heaters have a tendency to draw the nap off the sacks and hence wear away the fabric of the sacks.

My invention consists in the construction of beater hereinafter described, illustrated in the accompanying drawing and particularly pointed out in the claims at the end of this specification.

Figure 1 is a view in elevation of a beater embodying my invention. Fig. 2 is a view in vertical section on the line 2-2 of Fig. 1. Fig. 3 is a view similar to Fig.

2 but showing a modified form of the invention.

A designates the rotary shaft of my improved beater, this shaft having circular ends adapted to be held in suitable bearings and one end of the shaft being extended to receive a gear wheel whereby the shaft may be driven. My improved beater blade preferably comprises portions extending at opposite sides of the shaft A. This beater blade is formed of a plate of thin sheet metal B extending lengthwise of the shaft Specification of Letters Patent. Patented lIar, 30 1920, I

Application filed August 9, 1919. Serial No. 316,322.

and is suitably secured thereto. Preferably, the sheet metal plate of which the blades are formed is about 1/64 to 1/32 of an inch in thickness, as this will aflord suflicient elasticity to the blades. In forming my improved beater blade, the sheet metal plate of which it is composed is bent so that the side walls B and B of the blade are spaced apart from the shaft to the working edges of the blade, these side walls uniting at the working edge in a somewhat broad rounded curve I) to form a blunt beating edge. By this forming the blade, a suflicient width or bluntness is given to the beating edge to avoid cutting or otherwise injuring the fab ric of the sacks, while at the same time the blades thus spaced apart afiord the resiliency or elasticity desirable in beater blades of this character.

In Fig. 2 of the drawing, my improved beater blade is shown with portions on opposite sides of the shaft A as formed from a single sheet of metal united to the shaft A by screws C, the edges of the sheet meeting on one side of the shaft.

In Fig. 3 of the drawing, the portions of the beater blade upon opposite sides of the shaft are shown as formed of separate plates, the inner portions of these plates extending somewhat across the center of the shaft and being securely connected thereto by the screws C.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A rotary beater of the character described, comprising a shaft and a beater blade formed of a thin sheet metal plate extending lengthwise of the shaft and bent upon itself at the outer edge of the blade, the'inner portions of said blade being secured to said shaft and the outer walls of said blade being spaced apart from the shaft to the working edge, at which point they are united to form a blunt beating edge.

2. A rotary beater comprising the combination with a shaft, of a blade composed of a thin sheet metal plate bent upon itself at the outer edge of the blade to form integral side walls overlapping said shaft on opposite sides, said walls being inclined from the shaft toward each other and being spaced apart from their inner to their eX- posite sides of said shaft, said beater blades treme outer portions, said Walls being united being formed from a single plate of thin by a curved rounded portion of the plate to sheet metal bent at the outer edges of the 10 form a blunt beating edge. blades, said plate being so bent that the side 5 3. A rotary beater of the character de- Walls of said blades are spaced apart from scribed, comprising the combination with a their inner portions to their working edges shaft, of beater blades extending upon op- GEORGE ROYAN. 

